First of all it is a pleasure to see it in a good quality version, for me (I used to watch it on youtube, 'cause I can't reach american channels).

The italian version has a specific opening made for our market... actually it is not a great one, I'd prefer they used the original one which I LOVE very much (of course the one who aired from episode 6 in Us).

The voice cast is discrete, the voices sound a little bit "dry" (which is a standard of modern italian dub, sadly). Optimus Prime, ad predicted, is voiced by Marco Balzarotti, which sounds a little bit different from usual, because he uses a very deep tone to fit with the original characterization from Peter Cullen.

Megatron is instead voiced by Tony Fuochi, who gave his voice previously to Beast Wars Megatron, in the late 90s.

Ratchet voice is from Claudio Moneta, which is one of the best actors around, but he sound a little too young from the character, it is a shame they didn't confirm the Animated voice which was better.

Starscream is Daniele Demma, the same actor of Animated, but his voice is more deep (like Optimus) to fit the amazing characterization of Steve Blum.

Bulkhead changes his voice from Animated, here the actor is Pietro Ubaldi, who is a legend in cartoon italian voices, he made a LOT of different characters. In Animated he was Omega Supreme and Lugnut.

I didn't recognize Arcee's e Cliffjumper voices.

Jack, I'm not sure, but I think is Paolo De Santis, which sounds a little too old for the character.

Instead Raf is Davide Garbolino, another italian legend cartoon voice actor: he uses a light voice to fit in the young age of the character.

The dialogues are good, the original names are respected (in the 80s they were changed for a decision of the local firm which used to sell the toys, for example the Autobots were named "Autorobot" and Optimus Prime was simply "Commander". These names went on for a decade, and were replaced with the original ones in the late 90s).

As firts impression it is a decent version, though lower than the original one which is fantastic.

I think Pietro Ubaldi for Bulkhead is the right choice (he dubbed Ironhide in W4C... does this have a link with Animated Bulkhead being Ironhide in Japan or it's just plain coincidence?).
Optimus voice is unusual because it's also heavily filtered to sound metallic.
Ratchet voice is just plain wrong for the character, Stefano Albertini was way more suited for him.

Obviously I recorded it on my DVD recorder and the file is corrupted.
I can see it on the recorder but my PC won't read it and if I try to rip it (and sweating blood trying to do that), it lacks here and there pieces to a total of nearly 10 minutes... but the awful opening is fine...
Here it is the opening song: http://www.megaupload.com/?d=88LEXI2P
I think that if you don't understand the lyrics it may sound good.

Eh, I've heard the Italian dub for the first season (my best friend online is italian) and I'm not impressed on how the Transformers have this odd... monotone to their voices. They sound far more robotic than what they're supposed to sound like.

Huh... maybe I'm just not used to the way how foreign-language dubs are done. They're so odd...